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S-GW to S-GW tunnel
Posted on 27. Mar, 2013 by luca
I am studying the possibility to deploy a network-based Distributed Mobility Management (DMM) solution in LTE but a tunnel between Serving GW (where the distributed mobility anchoring function will be placed) is needed when the UE performs intra E-UTRAN handover on the S1 interface (X2 HO is not available).
The question therefore is:
is it possible to establish a user plane tunnel between two Serving GWs?
Or is it mandatory to go through the PDN GW via the S5/S8 interface and then again from the PDN GW to the target Serving GW?
Thanks in advance, I hope it is clear enough.
Indirect Data Forwarding Tunnel
might have found a solution myself: GTP-based Indirect Data Forwarding Tunnel.
This tunnel is established between source S-GW and target S-GW during S1-based handover that needs a S-GW relocation.
For Inter-RATi HO, in case of
For Inter-RAT HO, in case of indirect forwarding as well a tunnel will be established in between S-GW and target S-GW.